JP4645766B2 - Frameless molding machine - Google Patents

Abstract

The disclosed invention provides a molding machine that defines upper and lower molding spaces while cope and drag flasks 12,13 and a match plate 11 clamped therebetween are rotated from a horizontal position to a vertical position, and that readily places a core into a lower mold within the drag flask. An upper squeeze member 14 is insertable into the cope flask 12 with its pressure-applying plane being opposed to the upper face of the match plate 11. The pressure-applying plane defines an upper molding space together with the upper face of the match plate 11 and the cope flask 12. A pivoting frame 23 supports the cope and drag flasks 12,13, a match plate 11 clamped therebetween, and the upper squeeze member 14, such that they rotate in unison between a horizontal position, in which the pressure-applying plane of the upper squeeze member 14 is oriented vertically downward, to a vertical position in which the pressure-applying plane is oriented horizontally. A fixed, vertical, filling frame abuts the drag flask 13 when the flasks 12, 13 and the match plate 11 that is clamped therebetween are in the vertical position. A lower squeeze member 16 has a pressure-applying plane that is oriented horizontally, and is insertable into the filling frame and the abutting drag flask 13. The pressure-applying plane of the lower squeeze member 16 defines a lower molding space together with the lower face of the match plate 11, the drag flask 13, and the filling frame 15. To place a core into a lower mold within the drag flask, the drag flask 13 is laterally moved from a position that is immediately beneath the cope flask 12 such that an open working space is provided.

Description

  The present invention relates to a molding machine, and more particularly to a molding machine that simultaneously molds a frameless upper mold and a frameless lower mold.

  In the frameless molding method, an attempt is made to improve work efficiency using a known frameless molding machine. For example, in the one disclosed in Japanese Patent Laid-Open No. 04 [1992] -66245, a new pattern plate is exchanged mechanically and automatically with respect to a known frameless molding machine instead of manually. A mechanism is added.

  However, the frameless molding machine employed in the disclosed matter is described in the publication as “the molding machine body 10 has a known structure used for molding a so-called frameless mold”. Furthermore, it is a known frameless molding machine that is also used in the conventional frameless molding method in which the pattern plate is exchanged manually. Therefore, the process of forming a pair of molding spaces with a frameless molding machine is the same as the conventional method in which pattern plates are exchanged manually. That is, first, on the side of the molding machine, a pattern plate having models on both sides is sandwiched between the upper casting frame and the lower casting frame in a horizontal posture, and then these are integrated with the molding sand filling mechanism of the molding machine. Rotate downward to make it vertical. A pair of molding spaces is defined by inserting a pair of opposing squeeze heads from a horizontal direction into a pair of casting frames holding the pattern plate in a vertical posture. Therefore, in the conventional frameless molding machine, the process of forming a pair of molding spaces cannot be started until the upper and lower casting frames sandwiching the pattern plate are in a vertical posture. Due to this, the molding work in the molding machine still takes time, so that the mold production efficiency is inferior.

  The final molds formed by the frameless molding machine are the stacked upper mold and lower mold. Prior to the stacking of the molds, the core is often manually placed in a mold formed in the lower casting frame. However, in the above-described conventional frameless molding machine, when trying to place the core in the lower mold formed in the lower casting frame, the upper casting frame located immediately above it interferes with the worker, Child placement is not easy. This is also a factor that deteriorates the production efficiency of frameless molding machines.

  Accordingly, an object of the present invention is to provide a frameless molding machine capable of shortening the time required for molding a frameless mold and improving the production efficiency.

  Further, in such a frameless molding machine, when it is necessary to arrange the core in the lower mold formed in the lower casting frame, facilitating the arrangement work is also part of the object of the present invention. is there. However, in the frameless molding machine of the present invention, it is not essential to place the core in the molded lower mold.

  The present invention provides a molding machine for forming a pair of frameless molds. The molding machine includes an upper casting frame, a lower casting frame, and a replaceable match plate, and a pattern assembly formed on the upper and lower surfaces of the match plate; Means for moving the upper casting frame and the lower casting frame relative to the match plate such that the casting frame and the lower casting frame sandwich and release the match plate; and an upper squeeze member having a pressure surface, the upper squeeze The member can be inserted into the upper casting frame of the casting frame assembly such that the pressing surface faces the upper surface of the match plate, and the pressing surface is upper together with the upper and upper matching plates of the casting frame assembly. An upper squeeze member that defines a molding space; a horizontal posture in which the pressure surface of the upper squeeze member should be directed vertically downward; and the pressure surface is directed in the horizontal direction A support means for pivotally supporting the casting frame assembly and the upper squeeze member integrally with each other between the vertical posture and the vertical posture with respect to the lower casting frame when the casting frame assembly is in the vertical posture; A lower squeeze member having a fill frame arranged to abut; and a pressing surface oriented horizontally; the lower squeeze member can be inserted into the fill frame and the casting frame assembly is in a vertical position The pressurization surface can be inserted into the lower casting frame through the filling frame so that the pressing surface faces the lower surface of the match plate, and the pressing surface is the lower surface of the match plate, the lower casting frame, and the filling frame. And a lower squeeze member that defines the lower molding space; and the upper squeeze member is sized so that the pressing surface of the upper squeeze member inserted into the upper casting frame squeezes the foundry sand filled in the upper molding space. An upper actuator that drives the upper squeeze plate toward the upper surface; and a pressure plate of the lower squeeze member inserted into the lower casting frame squeezes the foundry sand filled in the lower molding space to match the lower squeeze member to the match plate A lower actuator that is driven toward the lower surface of the sheet; a transport mechanism that transports the match plate so that the match plate is inserted and removed between the upper and lower casting frames in a horizontal position; After the match plate is unloaded from between a certain upper casting frame and lower casting frame, a moving means for moving the lower casting frame to the side of the molding machine with respect to the upper casting frame is provided.

  In this case, the insertion of the lower squeeze member into the filling frame is started during the rotation period from the horizontal posture to the vertical posture, and when the filling frame comes into contact with the lower casting frame, the lower squeeze member is raised. The lower molding space is defined by the pressure surface of the lower squeeze member, the lower surface of the match plate, and the lower casting frame.

  The upper and lower actuators may be hydraulic cylinders, or electric cylinders or servo cylinders.

  The upper casting frame and the lower casting frame have sand supply holes on their side walls, and further include foundry sand introducing means for introducing the casting sand into the upper and lower molding spaces through the supply holes using air. May be. The foundry sand introduction means may have a fluidizing mechanism for fluidizing the foundry sand by jetting compressed air.

  The molding machine may further include a frame extraction mechanism for extracting the pair of molded molds from the upper casting frame and the lower casting frame. Preferably, the frame punching mechanism includes an extruding means for extruding the mold from the upper and lower casting frames which include a pair of molded molds and are in a stacked state.

  The above and other features and objects of the present invention will become more apparent from the following description with reference to the accompanying drawings.

FIG. 1 is a front view of an embodiment of a molding machine according to the present invention. FIG. 2 is a front view of the molding machine shown in FIG. FIG. 3 is a right side view of the molding machine of FIG. 4 is a top view showing a pair of molding spaces formed in the molding machine of FIG. 1 and elements related thereto. FIG. 5 is a front view showing a pair of molding spaces formed in the molding machine of FIG. 1 and elements related thereto partially cut away. 6 (A) and 6 (B) are continuous views showing a process of defining a pair of molding spaces by the molding machine of FIG. 7 (A) and 7 (B) are continuous views showing a process of filling molding sand into the molding space and squeezing the molding space by the molding machine of FIG. 8A and 8B are continuous views showing a process of separating the match plate from the pair of casting frames by the molding machine of FIG. FIGS. 9A and 9B are continuous views showing a state in which the match plate is unloaded from the molding machine of FIG. 1 and a step of arranging the core in the mold in the lower casting frame.

DESCRIPTION OF PREFERRED EMBODIMENTS

1 to 4 show an embodiment of a frameless molding machine according to the present invention. As a whole, the frameless molding machine includes a molding machine main body 1 arranged on the machine base 20 and a match plate 11 exchangeable between the upper casting frame 12 and the lower casting frame 13 of the main body 1 ( 2) and a transport mechanism 2 (FIG. 3) for carrying in and out. The upper casting frame 12 and the lower casting frame 13 each have a sand inlet on the side wall. A pattern is formed on each of the upper and lower surfaces of the match plate 11. A cast frame assembly is constituted by the upper cast frame 12 and the lower cast frame 13 and the match plate 11 sandwiched between the upper cast frame 12 and the lower cast frame 13.
The molding machine in the illustrated embodiment further includes a frame extraction mechanism 3 for extracting the upper mold and the lower mold formed by the main body 1 from the upper casting frame 12 and the lower casting frame 13.

1. Molding machine main body First, the main body 1 of the molding machine according to the present invention will be described. As shown in FIG. 2 in particular, the main body 1 is replaced by the above-described cast frame assembly (that is, the upper cast frame 12 and the lower cast frame 13, and the exchange between the upper cast frame 12 and the lower cast frame 13). Possible match plates 11) are included. The main body 1 further includes an upper squeeze member 14 that can be inserted into the upper casting frame 12 so as to face the upper surface of the match plate 11 of the casting frame assembly, a filling frame 15 fixed to the machine base 20 in a vertical posture, and this filling. The lower squeeze member 16 is disposed so that the pressing surface is oriented in the horizontal direction so that it can be inserted into the frame 15.

  FIG. 2 shows an initial state of the main body 1. In this state, the match plate 11, the upper casting frame 12, the lower casting frame 13, and the upper squeeze member 14 are in a horizontal posture, and the pressing surface of the upper squeeze member 14 is It is oriented vertically downward. The match plate 11, the upper casting frame 12, the lower casting frame 13, and the upper squeeze member 14 can be integrally rotated to a vertical posture as described later.

  On the other hand, the filling frame 15 and the lower squeeze member 16 do not rotate, and their directions are fixed in the horizontal direction. The prime frame 15 is fixed at a position where it contacts the lower casting frame 13 when the upper casting frame 12 and the lower casting frame 13 sandwiching the match plate 11 are in a vertical posture in which the rotation is completed. The lower squeeze member 16 can be inserted into the lower casting frame 13 in a vertical posture via the filling frame 15.

  The foundry sand filling mechanism 17 disposed in the upper center of the main body 1 fills the pair of molding spaces to be formed below (see FIGS. 1 and 2, the molding space is not yet formed). .

4 and 5, in the vicinity of the lower portion of the foundry sand filling mechanism 17, a pair of lateral upper actuators 18 for operating the upper squeeze member 14 and the lower squeeze member 16, respectively, The lower actuator 19 is disposed to face the lower actuator 19. These upper and lower actuators 18 and 19 are hydraulic cylinders in this embodiment, but may be electric cylinders or servo cylinders.
As shown in FIGS. 1 and 2, the rotating shaft 21 disposed on the upper right side of the machine base 20 extends in the front-rear direction of the main body 1 (perpendicular to the paper surface of FIGS. 1 and 2). Accordingly, only the front end surface of the rotating shaft 21 in FIGS. 1 and 2 is shown. The rotary shaft 21 is rotatably supported by a pair of bearings 22 (only the front bearing 22 is shown in FIG. 1) mounted on the machine base 20 at a predetermined interval in the front-rear direction. A rotating frame 23 extending substantially in the vertical direction is fixed to the vicinity of the center in the length direction of the rotating shaft 21.

  In particular, as shown in FIG. 2, a support member 24 extending in the right direction is attached to the lower right end of the rotating frame 23. As shown in FIG. 3, a pair of laterally oriented first cylinders (moving means) 25 are attached to the support member at a predetermined interval in the front-rear direction. A lower casting frame 13 is installed between the pair of first cylinders 25, and the lower casting frame 13 reciprocates in the left-right direction of the main body 1 by the expansion and contraction operation of the first cylinder 25.

  A pair of guide rods 26 extending substantially in the vertical direction are mounted on the right side of the rotating frame 23 with a predetermined interval in the length direction. As shown in FIG. 2, the pair of vertical guide rods 26 has a mounting member 27 for mounting the match plate 11 above the lower casting frame 13, and the upper casting frame 12 above the mounting member 27. Are supported slidably along the vertical guide rod 26 via a pair of guide holders 28 and a pair of guide holders 29, respectively.

  The mounting member 27 is mounted on a guide rail 31 extending in the longitudinal direction of the molding machine so as to be movable along the guide rail. The guide rail 31 moves up and down by the expansion and contraction operation of the second cylinder 30 attached to the rotating frame 23. The upper casting frame 12 has its piston rod tip fixed to a downward third cylinder 32 mounted on the rotating frame 23 via a support member (not shown). It moves forward and backward with respect to the mounting member 27.

  In particular, as shown in FIG. 1, an upper squeeze member 14 is installed between the ends of the piston rod at the center of the front and rear side surfaces (only the front side is shown in FIG. 1) of the upper casting frame 12 to expand and contract. A pair of laterally oriented fourth cylinders 33 that are moved forward and backward with respect to the upper casting frame 12 are attached. Therefore, the fourth cylinder 33 can rotate integrally with the upper casting frame 12 and the upper squeeze member 14. Two pairs of downward fifth cylinders 34 that push the upper casting frame 12 away from the match plate 11 are mounted on both ends of the upper and lower sides of the upper casting frame 12. Four upward sixth cylinders 35 are attached to both the front and rear outer surfaces of the lower casting frame 13 (FIG. 2) to push it away from the match plate 11.

As shown in FIG. 1, in the main body 1, a pair of rightward seventh cylinders 36 are mounted on both front and rear sides of the upper surface of the machine base 20. The upper part of the rotating frame 23 is connected between the tip ends of the piston rods of the pair of seventh cylinders 36 via a connecting mechanism 37, and the rotating frame 23 is connected to the rotating shaft 21 by the expansion / contraction operation of the seventh cylinder 36. Rotate up and down around.
The foundry sand filling mechanism 17 of the main body 1 is installed between a pair of seventh cylinders 36 on the upper surface of the machine base 20 as shown in FIG. As shown in FIG. 2, an injection mechanism 39 for injecting compressed air for fluidizing the foundry sand is provided below the sand tank 38 of the foundry sand filling mechanism 17.

  The plan view of FIG. 5 and the front view of FIG. 6 show the match plate 11, the upper and lower casting frames 12 and 13, the upper and lower squeeze members 14 and 16, and the fill frame 15 from the state shown in FIGS. The arrangement when the upper and lower molding spaces are formed as described above and swiveled to the casting sand filling mechanism 17 together with the related members is shown. 5 and 6, below the foundry sand filling mechanism 17 (FIG. 6), a support frame body 40 having a substantially C-shaped plane cross section is attached to the machine base 20 (FIGS. 1 and 2). It is.

  In particular, as shown in FIG. 5, the vertical frame 15 is mounted on the inner side of the left frame of the support frame 40 so that the vertical frame 15 abuts the lower casting frame 13 when defining the lower molding space. It is. The above-described single lower actuator 19 is attached to the center of the left frame of the support frame body 40 in a lateral direction, and a vertical lower squeeze member 16 is fixed to the tip of the piston rod. Each of the above-described upper actuators 18 is mounted on the pair of open ends of the support frame body 40 so as to face left.

2. It is described a match plate transport mechanism then molding machine transport mechanism 2 according to the present invention. The transport mechanism 2 is disposed behind the main body 1 shown in FIGS.

  As shown in the right side view of the molding machine in FIG. 4, the transport mechanism 2 guides the mounting member 27 for the match plate 11 (FIG. 2) between the upper casting frame 12 and the lower casting frame 13. have. The transport mechanism 2 is further attached to the machine base 20 of the molding machine in a vertical direction below the rails 41 at a predetermined interval, and a pair of horizontal tie bars 42 extending in the longitudinal direction of the molding machine (left and right in FIG. 4). It has a moving member 43 mounted so as to slide along the pair of horizontal tie bars 42, and a connecting mechanism 44 that removably connects the moving member 43 and the mounting member 27. The transport mechanism 2 further includes a drive mechanism 45 that reciprocates the moving member 43 along the horizontal tie bar 42. The drive mechanism 45 has a drive body 47 having a rotation arm 46 that rotates in the longitudinal direction of the molding machine. The tip of the rotating arm 46 and the moving member 43 are connected by a connecting mechanism 48. The mounting member 27 reciprocates in the left-right direction via the moving member 43 by reciprocating rotation of the rotating arm 46 driven by the driving body 47.

3. It is described the frame disconnect mechanism 3 of the frame disconnect mechanism then the molding machine according to the present invention. The frame removing mechanism 3 is disposed on the right side in FIGS. 1 and 2.

  As shown in FIG. 3, in the frame removal mechanism 3, a piston rod of a pair of downward eighth cylinders 50 attached to the machine base 20 via a support member 49 is attached to the lifting frame 51.

  Above the elevating frame 51 of the frame extraction mechanism 3, a receiving member 52 that receives the stacked upper and lower casting molds 12 and 13 that are extracted from the lower casting frame 13 is disposed. ing. The frame removal mechanism 3 also includes an extrusion mechanism 53 for extruding the upper mold and the lower mold in a stacked state on the receiving member 52 from above the receiving member 52.

Molding of upper and lower molds using a molding machine Using the molding machine according to the present invention shown in FIGS. 1 to 6, a frameless upper and lower mold is molded from the state shown in FIGS. The procedure will be described with reference to FIGS.

  First, the third cylinder 32 of the main body 1 is contracted and the match plate 11 and the upper casting frame 12 are sequentially superimposed on the lower casting frame 13 in a substantially horizontal posture, whereby the matching plate 11 is placed on the upper casting frame 12. And the lower casting frame 13 (FIG. 6A).

  Subsequently, in a state where the upper actuator 18 of the main body 1 is contracted, the pair of seventh cylinders 36 of the main body 1 are extended to rotate, and the rotation frame 23 is rotated around the rotation shaft 21 in the clockwise direction. The upper squeeze member 14 together with the upper casting frame 12 and the lower casting frame 13 sandwiching the plate 11 is conveyed between the upper actuator 18 and the filling frame 15 to be in a vertical posture. Simultaneously with this rotation, the lower actuator 19 is extended for a predetermined length and the pair of fourth cylinders 33 are contracted to start defining the upper and lower molding spaces shown in FIG. More specifically, the upper squeeze member 14 is inserted into the upper casting frame 12 so as to face the match plate 11 with the upper plate 12 and the lower casting frame 13 holding the match plate 11. Is defined. Since the upper casting frame 12 and the lower casting frame sandwiching the match plate 11, the upper squeeze member 14 and the fourth cylinder 33 that drives the upper casting frame 12 are integrally rotatable, the upper molding space is defined during the rotation period. can do. Simultaneously with this rotation, the lower actuator 19 is extended to cause the lower squeeze member 16 to be inserted into the fill frame 15 and inserted into the lower casting frame 13 that comes in a substantially vertical posture. When the rotation is completed and the lower casting frame 13 comes into contact with the filling frame 15, a lower molding space is also defined (FIG. 6B). Therefore, the time required for defining the molding space, and hence the time required for molding, is greatly reduced as compared with the conventional molding machine.

  Next, compressed air is supplied from a supply source (not shown) to the fluidizing air injection mechanism 39 of the sand tank 38, and the upper and lower molding spaces are filled with casting sand using air (FIG. 7A). When filling the foundry sand, it is preferable to supply compressed air also into the sand tank 38 to shorten the time for introducing the foundry sand in the sand tank 38, but the present invention is not limited to this.

  Subsequently, the upper actuator 18 and the lower actuator 19 are extended to move the upper squeeze member 14 and the lower squeeze member 16 toward the match plate 11, respectively, and squeeze the foundry sand in the upper and lower molding spaces. (FIG. 7 (B)). Due to the squeeze of the foundry sand, an upper mold and a lower mold are formed in the upper molding space and the lower molding space, respectively.

  Next, the pair of seventh cylinders 36 are contracted to rotate the rotating frame 23 counterclockwise, whereby the upper casting frame 12 and the lower casting frame 13 including the upper mold and the lower mold, respectively, are removed from the frame. 3 is turned (FIG. 8A).

  Subsequently, the pair of third cylinders 32 are extended to raise the upper casting frame 12 and the four fifth cylinders 34 are extended to push the match plate 11 away from the upper casting frame 12. At the same time, the four sixth cylinders 35 are extended to push the match plate 11 away from the lower casting frame 13 (FIG. 8B).

  In this case, the rising speed of the upper casting frame 12 due to the extension operation of the pair of third cylinders 32 is approximately twice the separation speed of the match plate 11 from the lower casting frame 13 due to the extension operation of the four sixth cylinders 35. By doing so, the separation speed of the upper casting frame 12 and the lower casting frame 13 from the match plate 11 can be made substantially the same.

  Next, the driving member 47 of the driving mechanism 45 of the transport mechanism 2 is driven to rotate the rotating arm 46 forward and backward, thereby reciprocating the moving member 43 and the mounting member 27 in the front-rear direction, and the match plate 11. Is carried out from between the upper casting frame 12 and the lower casting frame 13 (FIG. 9A).

  Subsequently, if necessary, the core may be manually placed in the mold in the lower casting frame 13 by the worker (FIG. 9B). For this purpose, the pair of first cylinders 25 are extended to move the lower casting frame 13 in the side direction of the main body 1 (worker side) with respect to the upper casting frame 12. In this case, as apparent from FIG. 9B, the space above the lower casting frame 13 is open, so that the upper casting frame 12 does not interfere with the operator who arranges the core. Therefore, it is easy to arrange the core in the mold in the lower casting frame 13. After the core is disposed in the mold in the lower casting frame 13, the pair of first cylinders 25 are contracted to return the lower casting frame 13 to the original position (a position directly below the upper casting frame 12). However, if it is not necessary to arrange the core, the step shown in FIG. 9B can be omitted.

  Next, the third cylinder 32 is contracted to lower the upper casting frame 12 and overlap the lower casting frame 13. Further, the eighth cylinder 50 of the frame removal mechanism 3 is contracted to raise the receiving member 52 via the lifting frame 51 and contact the lower surface of the lower mold. Subsequently, the pair of fourth cylinders 33 is contracted to press the mold in the upper casting frame 12 downward via the upper squeeze member 14 and the eighth cylinder 50 is extended to operate the lifting frame 51. Then, the receiving member 52 is lowered, and the upper mold and the lower mold are extracted from the upper casting frame 12 and the lower casting frame 13. Next, the pair of fourth cylinders 33 are extended to raise the upper squeeze member 14.

  Next, the pushing mechanism 53 is driven to push the stacked upper and lower molds on the receiving member 52 from the receiving member 52. As a result, an unframed upper mold and lower mold in a stacked state are obtained.

  The above embodiments are merely examples of the present invention, and are not intended to limit the present invention. It will be apparent to those skilled in the art that many changes and modifications can be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (6)

A molding machine for molding a pair of frameless molds,
Machine base,
A support frame body mounted on this machine base;
A casting frame assembly in which an upper casting frame, a lower casting frame, and a replaceable match plate are overlaid, and a pattern is formed on the upper and lower surfaces of the match plate;
The upper casting frame and the lower casting frame are sandwiched and released between the upper casting frame and the lower casting frame so as to sandwich and release the match plate that constitutes the casting frame assembly together with the upper casting frame and the lower casting frame. Means for moving the frame relative to the match plate in a horizontal position;
An upper squeeze member having a pressing surface, the upper squeeze member being insertable into the upper casting frame of the casting frame assembly such that the pressing surface faces the upper surface of the match plate, and the pressing surface An upper squeeze member that defines an upper molding space together with an upper surface of the match plate of the casting frame assembly and the upper casting frame;
A rotating frame that is rotatable about a rotation axis supported by the machine base;
The Rukoto is attached to the pivoting frame supporting integrally with said relative movement is allowed means and the drag flask assembly and the upper squeeze member, by the rotation of the pivoting frame, the pressing surface of the upper squeeze member a horizontal posture to be oriented vertically downwardly, the pressing surface is between the vertical position to be oriented in a horizontal direction, integrally rotating with said drag flask assembly and the upper squeeze member and means for moving the relative and support means for the movement possible,
A lower squeeze member having a pressing surface oriented in a horizontal direction and having a fixed orientation, and the lower squeeze member is configured such that when the casting frame assembly is in the vertical posture, the pressing surface is the match plate. A lower squeeze member that can be inserted into the lower casting frame so as to face the lower surface of the lower squeeze member, and whose pressing surface defines a lower molding space together with the lower surface of the match plate and the lower casting frame,
The upper squeeze member rotated to the vertical posture is moved to the upper surface of the match plate so that the pressing surface of the upper squeeze member inserted into the upper casting frame squeezes the foundry sand filled in the upper molding space. An upper actuator mounted on the support frame body to be driven toward the
The support frame is configured to drive the lower squeeze member toward the lower surface of the match plate so that the pressing surface of the lower squeeze member inserted into the lower casting frame squeezes the foundry sand filled in the lower molding space. A lower actuator attached to the body;
The match plate that constitutes the cast frame assembly is inserted and removed between the upper cast frame and the lower cast frame in the cast frame assembly in the horizontal posture together with the upper cast frame and the lower cast frame. In a molding machine for forming a pair of upper and lower frameless molds, including a transport mechanism for transporting this match plate,
After the match plate is unloaded from between the upper casting frame and the lower casting frame in the casting frame assembly in the horizontal posture, the lower casting frame is moved to the upper casting frame from the molding machine. Moving means for moving to the side;
Of the casting frame assembly and the upper squeeze member that are integrally pivotally supported by the support means, the upper squeeze member is moved upward and backward with respect to the upper casting frame. When the cast frame assembly and the upper squeeze member are integrally rotated by the support means, the additional actuator is rotated together with the upper cast frame of the cast frame assembly. When,
A filling frame that is fixed in a horizontal direction and does not rotate, and the filling frame is in contact with the lower casting frame in a vertical posture when the casting frame assembly is in the vertical posture. And, the lower squeeze member is fixed to the support frame body at a position where the lower squeeze member can be inserted into the lower casting frame through the fill frame by driving the lower actuator,
During the period in which the casting frame assembly and the upper squeeze member are rotated from the horizontal posture to the vertical posture by the support means, the upper casting of the casting frame assembly that is rotating the upper squeeze member being rotated. The lower actuator is driven while the upper molding space is defined by the pressing surface of the upper squeeze member, the upper surface of the match play of the casting frame assembly, and the upper casting frame by being driven by the further actuator of the frame. When the insertion of the lower squeeze member into the fill frame is started, and when the fill frame comes into contact with the lower cast frame, the lower squeeze member is inserted into the lower cast frame via the fill frame. The lower molding space is defined by the pressing surface of the lower squeeze member, the lower surface of the match plate, and the lower casting frame. Machine. 2. The molding machine according to claim 1, wherein the upper and lower actuators include a hydraulic cylinder, an electric cylinder or a servo cylinder. 3. The molding machine according to claim 1, wherein the upper casting frame and the lower casting frame have sand supply holes on their side walls, and air is discharged through the supply holes into the defined upper and lower molding spaces. A molding machine further provided with foundry sand introducing means to be introduced using the above-mentioned. 4. The molding machine according to claim 3, wherein the foundry sand introducing means has a fluidizing mechanism for fluidizing the foundry sand by injection of compressed air. The molding machine according to any one of claims 1 to 4, further comprising a frame extraction mechanism for extracting a pair of molded molds from the upper and lower casting frames. 6. The molding machine according to claim 5, wherein the frame removing mechanism includes an extruding means for extruding the mold from the upper and lower casting frames in a stacked state including a pair of molded molds.

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